.loading_wp {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    text-align: center;
    background-color: #202020;
    opacity: 0.5;
}

.loading_wp img {
    position: absolute;
    top: 50%;
    left: 50%;
    margin-top: -200px;
    margin-left: -200px;
}